Oxime is a protected form of carbonyl compound and is considered to be their equivalent. Various methods are adopted for the deoximation processes to effectively and suitably obtain the parent or new aldehydes and ketones. Deoximation can be achieved using various processes like oxidation, reduction, hydrolysis, hydrogenation etc. using organic and inorganic reagents. Besides, some surface templated processes and photochemical processes are also used to give products in a remarkably effective way.